Mechanism for intermittent movement



Sept. 5, 1950 v w GANZ 2,521,211

MECHANISM FOR INTERMITTENT MOVEMENT Filed May 15. 1946 v 4 Sheets-Sheet 1 6349 J7 w M 65 za alim@ ATTORNEY Sept. 5, 1950 w. GANZ MECHANISM FOR INTERMITTENT MOVEMENT 4 Sheets-Sheet 2 Filed May 13, 1946 INVENTOR fwd/wf 6fm/z,

ATTORNEY Sept' 5y W. GANZ MECHANISM FOR INTERMITTENT MOVEMENT Filed May 13, 1946 4 Sheets-Sheet I5 @Pauw ATTORNEY Patented Sept. 5, l1950 MECHANISM FOR INTERMITTENT MOVEMENT William Ganz, Teaneck, N. J., assigner to Ganz Brothers, Bergeneld, N. J., a firm Application May 13, 1946, Serial No. 669,287

(Cl. 'M -116) 18 Claims. l

This invention relates to mechanism for providing certain types of mechanical movements. More particularly, this invention relates to novel mechanism for converting continuous mechanical movement to intermittent movement.

Prior to this invention, a number of different types of mechanism have been suggested for converting continuous movement to intermittent movement. While some of them have been employed in the machinery field, all of them have for one reason or another failed to be completely satisfactory especially where high speed is a requisite. Consequently, this invention has been made to provide various mechanisms which because of the type and relationship of parts are rugged and easily assembled and will operate at high speeds over a considerable period of time without necessity of repair or replacement. The foregoing as well as other advantages of this invention will be readily apparent from the following description and accompanying drawings, wherein:

Fig. l is a perspective view of a drive mechanism enclosed in an oil filled housing embodying my invention.

Fig. 2 is a fragmentary top plan view of one embodiment of the invention and is taken on line lI-II of Fig. 3 in the direction of the arrows.

Figs. 3, 4 and. 5 are side views of the mechanism shown in Fig. 2 and show the various relationships of parts at different stages of operation.

Fig. 6 is a fragmentary side view of another embodiment of the invention.

Fig. '1 is a fragmentary top plan view of the mechanism shown in Fig. 6.

Fig. 8 is a side view of another embodiment of the invention.

Fig. 9 is a top plan view of the mechanism shown in Fig. 8.

Fig. 10 is a side view of another embodiment of the invention.

Fig. 1l is a top plan view of the mechanism shown in Fig. 10.

Fig. l2 is a side View of still another embodiment of the invention.

As shown in the drawings, there may be provided a, box housing I8 having rear side -I I, front side I'2, ends I3, bottom I4 and a demountable top I5. H is an input shaft I1 extending inside and outside of the side II. The end of the shaft I1 has a sprocket I3 keyed thereto. A source of power, and as shown, an electric motor and in most instances a constant speed motor I9 has its driving Mounted in a bearing I6 carried by side shaft 2|] coupled to the shaft I8 through a chain drive 2 I. As the motor drives shaft 20, the chain 2| drives the input shaft I1 through the sprocket I8 to continuously drive input shaft I1. Spaced from shaft I1 and disposed parallel thereto is an input shaft 22 mounted in a bearing 23 carried by side I I. This shaft 22 also extends inside and outside of the side II and secured to its outer end is a coupling device 24 which may be operatively connected to mechanism which is to be intermittently driven.

Located in the box IU and keyed to that end of shaft I1 located therein is an eccentric plate 25 having pivot pin 28 keyed thereto. Also located in box IIJ is an intermittent plate disc 21 keyed to that end of shaft 22 located in said box. The diameter of the plate disc 21 is preferably about twice that of the eccentric plate '25. A plurality of and as shown, eight needle roller bearings 3I38 are rotatably mounted on the disc 21. These roller bearings .3l- 38 are disposed on a common circumferential center line near the outer periphery of said plate 21 and are spaced equdistantly from each other. Located to one side of plate 21 remote from plate 25 and integral with side I I is a bearing 48 extending into lsaid box. A pivot 4I is mounted in said bearing 40 and has integral therewith a slide box 42 having integral therewith an upwardly extending trunnion lever 43 at the front thereof. The central axes of the pivot 4I and shaft I1 are located on a line which is at right angles to a diameter of shaft 22 and which is located materially below said shaft 22. The upper free end of lever 43 has a slot 44 therein defining a pair of lingers 45. A bearing 46 is mounted on side II, is integral therewith and extends into box I0. The bearing 46 is located behind the extension 43 and has mounted therein a pivot 41. Integral with the pivot 41 is a trunnion lever 48 whose upper free end has a slot 49 therein dening lingers 50. A roller bearing 5I is disposed in slot 44 and has an annular ange 52 lapping over` the lingers 45. Mounted on the side I I and extending into box I0 is support 55 integral with side II. Mounted on said support is a slide box 51 having an elongated slot 58 in the rear part of the front plate thereof. Slideably mounted in said slide box 51 is a slide bar 59 having a slot in one end thereof defining lingers 6I. Carried by the slide bar 59 and extending through slots 58 and 49 is a roller bearing 62 having a flange 63 integral therewith and lapping over linger 50. Eccentrically and pivotally connected to the shaft I1 is a drive bar 65 having one end thereof pivotally connected to the pivot 26 and its other end extending through the pivoted slide box 42. The rear face of the slide bar 65 has a pair of spaced recesses 66 accommodating inserts integral with driving blocks 61 secured to operating bar 65. The distance between the blocks is equal to the diameter of each of the needle roller bearings 3|-38.

The operation of the mechanism shown in Figs. 1-5 is as follows: The input shaft |1 is continuously driven by the motor I9 and is the main continuous drive shaft whose direction of rotation is shown in Figs. 3-5. With'tlie movable parts disposed in the relationship shown in Fig. 3, the operable drive blocks 01 are in inoperative position and the slide lock bar 59 is in operative position with the roller bearing 34 located in the slot 60 thereof thereby locking and maintaining stationary the output shaft 22. As the eccentric plate 25 is driven by the shaft |1 to move the pin 26 from point A to point B, the slide drive bar 65 is moved in a direction away from slide box 51 and towards shaft |1 and that end of bar 65 swingable about pivot 26 `is moved downwardly and then upwardly until it has described a semi-circle. Immediately upon leaving point A, the drive blocks 61 begin to retract and are completely out of engagement with roller bearing 32 and the lock bar 59 .is simultaneously moved forward to locking position to locate the fingers 6| into locking'engagement with roller bearing 34. Upon continued movement of the pivot 26 through an angle of 90 from point A to Ythe position shown in-Fig. 3,'the bar 65 continues to retract, its pivoted end swings to itsmaximum lower position to'move the drive blocks 61 to 'their maximum position away from the roller bearings 3|-38 and the slide boX 42 and trunnion 43 are swung to a maximum position to actuate the lock bar 59 to its'maximum forward locking position. In the course of travel of pivot 2E from its position shown in Fig.j3 to point B, the pivot 26 travels another 90 andthe bar 55 continues to retract and reaches its maximum retracted position and also swings upwardly about the fulcrum of slide box 42. This action swings slide box 42 acting through trunnion 43 to retract slide bar 59 and also moves the drive blocks 61 towards the Vnext roller bearing 3|, As the pivot 26 reaches the point B, the relationship of parts is shown in Fig. 4 where the slide bar 65 is at dead center, `with the Alock bar 59 just about to disengage the roller bearing 34 and the drive blocks just about to engage roller bearing 3|. Upon continued rotation of shaft l1 to move the pin 26 from the point'B to point C, and immediately upon leaving point B, the lock bar 59 `is completely disengaged from roller bearing 34 and the drive blocks engage the roller bearing 3|. As the pivot 26 moves from point B tothe position shown in Fig. 5, the bar 65moves forwardly and its end pivoted at' 26 moves upwardly; whereupon the slide block 42 and its trunnion 43 swing about the slide box fulcrum to a maximum position when pin 26 lreaches the position vshown in Fig. 5 whereupon the bar 59 is at its maximum retracted position and the plate 21 has been moved through an angle of 22.5. As the pivot 26 is moved from the position shown in Fig. 5 back to original point B, the bar 65 still moves forwardly and its pivoted end at 26 now moves downwardly further to drive the plate 21 through an additional angle of 22.5 and to swing the block 42 to feed the slide bar 59 towards locking position. When the pivot 26 reaches position B,

the slide block 42 has been rocked to such position as to act through trunnion 43 to actuate slide bar 53 to initial locking position and the blocks 61 are just about to become engaged with the roller bearing 36. The cycle of operation of parts is continued to provide an intermittent movement. In this embodiment, instead of having roller bearings on the intermittent plate 21, and a slot between the blocks 61, the plate 21 may be slotted and the drive blocks 61 may be replaced by a driving pin or roller bearing in the manner shown in Fig. l0. If this is done, the configuration of the periphery of the plate 21 may be also modied so as to be similar to that of the intermittent plate of Fig. l0.

Another embodiment of the invention is shown in Figs. 6 and 1 having three bearings |00, |0| and |02 carried by side of box I0. Mounted in bearings |09 and |0| respectively are input shaft I|1 and output shaft |22. The continuous drive shaft l l1 has an eccentric plate cam lock |03 keyed thereto. The eccentric |03 is essentially a circular disc having a portion thereof cut away at |04 to provide clearance and a locking portion |05 during rotation of eccentric |03. Keyed to the shaft |22 is an intermittent plate |21 whose diameter may be twice that of the eccentric |03. Eight needle roller bearings ISI-A39, located equidistantly from each other, are rotatably mounted on plate |21 and are disposed on a commonA circumferential line near the outer periphery of plate |21. The outer periphery of. plate |21 between each pair of roller bearings |3||36 is cut away to provide arcuate cut-outs |06. The radius of each of said cut-outs |66 is the same as the radius of the lock portion |05 of the eccentric.

Mounted in bearing |02 is a pivot |01. One end of a swing lever arm |68 is pivotally mounted on pivot |01 and its other end carries a pivot |09. An operating or drive lever bar |65 has one end thereof pivotally mounted on pivot |09 and its other end pivotally and eccentrically connectedV to eccentric |03through a pivot pin |26 carried by eccentric |03. In this embodiment, the parts may be in such relationship as shown in Fig. 6 that a straight line may be drawn transversely through the central longitudinal axes of the pivots |26, |09 and shaft |11 and is atright angles to a diameter of shaft |22. Secured t0 the drive bar |65 are a pair of drive blocks |61 spaced from each other a distance equal to the diameterof roller bearings I3 68.

The operation of the mechanism shown in Figs. 6 and 7 is as follows:

At that stage of operation when the parts are located in the relative positions shown in Fig. 6, the locking portion |05 of the eccentric cam lock is just about in unlocking position and the slide bar |65 has been moved over to its maximum right hand position whereupon the ends of the drive blocks |61 just about engage the roller bearing |3|. Upon 180 rotation of the shaft |1 and plate |03, the lever |08 swings pivot pin |01 to the point A and that end of the bar |65 pivoted to pin |26 moves forwardly and upwardly and then forwardly and downwardly whereby the drive blocks |61 drive the plate |21 through the roller bearing |3| which at the end of the forward movement of bar |65 reaches the position originally occupied by bearing |38. When bearing 3| reaches that position, the leading end of locking portion |05 comes into contact with a cut-out |06 to lock the intermittent plate in position andl simultaneously the blocks |61 disengage the roller bearing |3I. next 180 rotation of shaft I |1, the bar |65 moves downwardly rearwardly and then downwardly forwardly until the pivot |26 reaches the position shown in Fig.- 6. In the course of this particular movement of shaft H1, the portion 05 is 'continuously in Contact with arc to lock the shaft |22 against rotation While the blocks |61 were completely inoperative and the lever |08 is swung to its original position. The 360 cycle is repeated to provide intermittent movement of the shaft |22.

The modication rshown in Figs. 8 and 9 is similar to that shown in Figs. 6 and 7 and differs therefrom in that the elements |91, |08 and |09 are eliminated and two simultaneously operating eccentric plate cam locks |03 are employed and the ends of the slide bar |65 are pivotally connected to the pivot pins |26 carried by these eccentrics |03. The'shafts i|1 are driven by a, common main drive H1 through gears 10 keyed to said shafts.

The modification shown in Figs. l0 and l1 is similar to that shown in Figs. 8 and 9 and differs therefrom in the substitution of a drive roller bearing 361 on the drive bar |55 in placel of the drive blocks, and the elimination ofthe roller bearings |3||38 and the substitution of slots 33|-338 therefor.

The modification shown in Fig. l2 is the same as that shown in Fig. 6 with the following additions: Another drive shaft 4| 1 is'remote from the shaft H1 and is a continuous drive through a chain d coupled with sprockets 41| keyed to shafts H1 and M1. Another shaft 422 is remote from shaft |22 and is driven by a chain 413 coupled with sprockets 410 keyed to shafts 422 and |22. The shafts M1 and 422 respectively lhave keyed thereto intermittent plates |21 and |03. With this embodiment of the invention, the intermittent locked movement maybe affected at a plurality of locations of operation.

In all of the embodiments of the invention, the slots in the intermittent plate and the drive roller bearing on the drive bar as shown in Figs. 10 and ll may be employed in place of the rollers on the intermittent plate and the drive blocks on the drive bar as shown in the other figures.

I claim:

l. Mechanism for converting continuous rotary motion to intermittent motion comprising a ro tatable input shaft. a rotatable output shaft, a drive bar, one end of said drive bar being pivotally and eccentrically associated with said input shaft, means for intermittently actuating said output shaft and including said input shaft and said drive. bar, means supporting ,the other end of said drive bar and being independent ef said output shaft and means operatively connected to Said input shaft for intermittently locking said output shaft and including a member secured to said output shaft and a memberl s cured to said input shaft, the periphery of a 'portion of each of said members being an arc of a circle, the radii of said arcs being substantially the same.

2. Mechanism for converting continuous ro tary motion to intermittent motion comprising a rotatable input shaft, a rotatable output shaft, a drive bar, one end of said drive bar being pivotally and eccentrically associated with said' input shaft, means for intermittently actuating said output shaft and including saidinput shaft and said drive bar, means supporting the other `end of said drive bar and being independent of said output shaft and means operatively connected Upon the f 6 r to said input shaft for intermittently locking said output shaft and including a member secured to said output shaft and a member secured to said input shaft, the periphery of said rst mentioned member including a plurality of individual arcs of a circle, the periphery of a portion of said second mentioned member being an arc of a circle, the radii of said arcs of both of said members being substantially the same.

3. Mechanism for converting continuous rotary motion to intermittent motion comprising a rotatableinput shaft, a rotatable output shaft, a drive bar, lone end of said drive bar being pivotally and eccentrically associated With said input shaft, means for intermittently actuating said output shaft and including said input shaft and said drive bar, a pivot disposed at a substantially fixed location, a link having one end thereof connected to said pivot, the other end of said drive bar being pivotally connected to the other end of said link and means operatively connected to said input shaft for intermittently locking said output shaft and including a member secured to said output shaft and a member secured to said input shaft,v the periphery of a portion of each of saidmembers being an arc of a circle, the radii of said arcs being substantially the same.

4. Mechanism for converting continuous rotary motion to intermittent motion comprising a rotatable input shaft, a rotatable output shaft, a drive bar, one end of said drive bar being pivotally and eccentrically associated with said input shaft, means for intermittently actuating said output shaft and including said input shaft and said drive bar, a pivot disposed at a substantially fixed location, a link having one end thereof connected to said pivot, the other end of said drive bar being pivotally connected to the other end of said link and means operatively connected to said input shaft for intermittently locking said output shaft and including a member secured to said output shaft and a member secured to said input shaft, the periphery of said first mentioned member including a plurality of individual arcs of a circle, the periphery of a portion of said second mentioned member being an arc of a circle, the radii of said arcs of both of said members being substantially the same.

5. Mechanism for converting continuous rotary motion to intermittent motion comprising a rotatable output shaft, a rotatable input shaft, a drive bar, one end of said drive bar being pivotally and eccentrically associated with said input shaft, means for intermittently actuating said output shaft and including said input shaft and said drive bar, a pivoted slide box, the other end of said drive bar slideably mounted in said box and means operatively connected to said slide bok for intermittently locking said output shaft.

6. Mechanism for converting continuous rotary motion to intermittent motion comprising a plurality of rotatable input shafts, a rotatable out- `put shaft, a drive bar, one end Aof said drive bar being pivotally and eccentrically associated with one4 of said input shafts, the other end of said drive bar being pivotally and eccentrically associated with another of said input shafts, means for intermittently actuating said output shaft and including said input shafts and said drive bar and means operatively connected to each of said input shafts for intermittently locking said output shaft.

'7. Mechanism for converting continuous rotary motion to intermittent motion comprisinga plurality of rotatable input shafts, a rotatable output'shaftfa drive'bar,A one endof Vsaid drive bar beingipivotally and 'eccentrically associated vvithV one offsaidinput shafts, the other end of 'saidr drive bar being pivotally and eccentricall'yass ciated with another of said input shafts; means for intermittently actuating said output shaftV andinc-luding said input shafts andsaid drive barandmeans operatively connected to each'of said input shafts for intermittently Alocking said output shaft and including a member secured to said output shaft .and a member secured to each of said input shafts, the peripheryof said .rst mentioned'member including a plurality of vindividual arcs of a'circle, the periphery `of aportion of each. of saidv members secured to said.

input shafts being an arc of a circle, the radii ofsaid arcs'of said three members beingfsubstantially the same.

8.-Mechanism for converting continuous rotary motion to'intermittent motion comprising a rotatable inputkshaft, a rotatable output shaft, a

reciprocable drive bar, a pair of drive blocks'l securedv -to said drive bar intermediate the endsof said drive bar,l one end of .said drive bar being pivotally and' eccentrically associated with said input shaft' and being reciprocable thereby, means supporting lthe other end ofsaidzdrivebar and being independent of saidoutput 'shaftymeanstsecured to said 'output shaft and intermittently engageable by 'said drive' blocks'upon. reciprocation'of '.said drive tbar` to` intermittently driveA said output shaft, and means operatively` connected `to said, input Ashaft .for

intermittently locking said output shaft; and in cluding'- amember securedY to fsaid/ output shaft" and a membersecuredtOsaid input shaft,` the.

periphery-of a portion of eachofsaid members being an :arc of a circle, the radii ofrsaid arcs being substantiallyvthe same.

9. Mechanism for convertingcontinuous rotary motion to l intermittent 'motion comprising arotatable-inputshaft, a, lrotatable output shaft, al.

reciprocable -drive bar,- av pair of-driveV blocksy intermediate :the ends of said drive bargone endoff-said drive bar being pivotallygand eccrentrically;

associatedvvvith said'input shaft andbeing reciprocable thereby, means supporting the other end of said drivebarand beingindependent of said output shaft, a plate secured tofsaid output shaft, a-plurality of rollers carried by said plate,

spacedequidistantly from each other,;disposed on the circumference of a circle andbeing individually andfintermittently engageable by said driveblocks upon-reciprocation of said-drive barto intermittently drive said output-shaft, and'means f;

operativelyconnected to said input shaft for intermittently locking said output `shaft land in-l cluding a member secured to said-,output shaft and a member secured toA said-input shaft, .the f peripheryof a portion of each of said members beinganarcvof acircle, the radii of said arcs being substantially the same. c

10.v Mechanism. forV convertingVA continuous rotary motion to intermittent motionecomprising.

a rotatable inputshaft, a rotatable output shaft,

a reciprocableqdrive member, one. end of said,-

driver .memberbeng pivotally and eccentricallyassociated with said input shaft. and being con-v f tinuously lreciprocable thereby, a member secured` to said outputv shaft, one of saidcmembers having a slot therein,.a .roller carried bythe other of said members and being intermittentlyengageable insaid slot upon reciprocationiofsaid drive member to intermittently drive said outputgshaft, a pivot disposed at asubstantially xed location,

8 1 aflink'having one/end thereof connected v'to said pivot,'the other end of said drive vmember being pivotally connected to the other end of said link and means operatively connected to said input w shaft for intermittently lockingsaid output shaft and'including an yelement secured to said output shaftand vanelement secured to said input shaft, the-peripheryy ofaportion of each of said elements beingan arc-of a circle, the radii of saidI arcs 'being'` substantially the same.

11. Mechanismffor convertingcontinuous rotary motion to intermittent motion comprising aerotatable input shaft, a rotatable'output shaft,

arreciprocable drive bar, a pair of drive blocksv 'secured to said drive bar intermediate the ends of'said drive bar, one end'of said drive bar being pivotally and-feccentrically,` associated with said inputshaft and being continuously reciprocable thereby, a pivot disposed at a'substantially xed :location a link having one end thereof connected to said pivot, the other end of said drive bar being pivotally connected to the other end of said link, means secured to said'output shaft and intermittentlyengageableby said drive blocks upon revci-procation .of said drive'bar vto intermittently drive 'saidv output shaft, and means operatively connected toy saidy inputY shaft for intermittently locking said-output shaft 'and including a meme ber secured to said output shaft anda member secured to said input shaft, the periphery of a portion of'veach` of said members being an arc of ay circle, the radii of said arcs being substantiallythe same.

12.. Mechanism forlconverting continuous rotary motion to intermittent motion comprising a rotatable input shaftpa rotatable output shaft, a Vreciprocable'drive bar, a pair of drive blocks securedto said drive bar intermediate the ends' of said drive bar,fone end of said drive bar being pivotally and eccentrically yassociated with said input shaft and being continuously reciprocable thereby, a pivot disposed at a substantially fixed location, a link having one end thereof connected to saidpivot, the other end of said drive bar being `pivotally connected to the other end of said link,-

a -plate secul'edto said output shaft, a plurality of. rollers carried by said plate, spaced equidis-v tantly from each other, disposed on the circumference of a circle and being individuallyand in termittently engageableby saiddrive blocks upon reciprocation-of said drive bar to intermittentlyA drive-'said output shaft, and means operatively connected to said input vshaft for intermittently locking said output shaft and including a member secured-to said output shaft and a member Iof saididriveibar-,Vone end of said drive bar being pivotally and eccentrically associated with said input shaft andbeing continuously reciprocable thereby, means secured to said output shaft and f intermittently Vengageable by said drive blocks `upon reciprocation of said drive bar to intermittently drive saidvoutput shaftfa piveted slide box, the other end of said drivebar slideably mounted in saidbox land means operatively connected to said slide box for intermittently locking said output shaft.

14. Mechanism for converting continuous rotary motion to intermittent motion comprising a rotatable output shaft, a rotatable input shaft, a reciprocable drive bar, a pair of drive blocks secured to said drive bar intermediate the ends of said drive bar, one end of said drive bar being pivotally and eccentrically associated with said input shaft and being continuously reciprocable thereby, a plate secured to said output shaft, a plurality of rollers carried by said plate, spaced equidistantly from each other, disposed on the circumference of a circle and being individually and intermittently engageable by said drive blocks upon reciprocation of said drive bar to intermittently drive said output shaft, a pivoted slide box, the other end of said drive bar slideably mounted in said box vand means operatively connected to said slide box for intermittently locking said output shaft.

15. Mechanism for converting continuous rotary motion to intermittent motion comprising a plurality of rotatable input shafts, a rotatable output shaft, a reciprocable drive bar, a pair of drive blocks secured to said drive bar intermediate the ends of said drive bar, one end of said drive bar being pivotally and eccentrically associated with one of said input shafts, the other end of said drive bar being pivotally and eccentrically associated with another of said input shafts, means secured to said output shaft and intermittently engageable by said drive blocks upon reciprocation of said drive bar to intermittently drive said output shaft, and means operatively connected to each of said input shafts for intermittently locking said output shaft.

16. Mechanism for converting continuous rotary motion to intermittent motion comprising a plurality of rotatable input shafts, a rotatable output shaft, a reciprocable drive bar, a pair of drive blocks secured to said drive bar intermediate the ends of said drive bar, one end of said drive bar being pivotally and eccentrically associated with one of said input shafts, the other end of said drive bar being pivotally and eccentrically associated with another of said input shafts, a plate secured to said output shaft, a plurality of rollers carried by said plate, spaced equidistantly from each other, disposed on the circumference of a circle and being individually and intermittently engageable by said drive blocks upon reciprocation of said drive bar to intermittently drive said output shaft, and means operatively connected to each of said input shafts for intermittently locking said output shaft.

17. Mechanism for converting continuous rotary motion to intermittent motion comprising a rotatable input shaft, a rotatable output shaft, a reciprocable drive member, one end of said drive member being pvotally and eccentrically associated with said input shaft and being continuously reciprocable thereby, means supporting the other end of said drive member and being independent of said output shaft, a member secured to said output shaft and having a plurality of radial slots therein spaced equidistantly from each other, means carried by Said drive member and being intermittently engageable in said slots upon reciprocation of said drive member t0 intermittently drive said output shaft, and means operatively connected to said input shaft for intermittently locking said output shaft and including a member secured to said output shaft and a member secured to said input shaft, a portion of the periphery of each of said last two mentioned members being an arc of a circle, the radii of said arcs being substantially the same.

i8. Mechanism for converting rotary motion to intermittent motion comprising a pair of rotatable input shafts, a rotatable output shaft, a reciprocable drive member, one end of said drive member being pivotally and eccentrically associated with one of said input shafts, the other end of said drive member being pivotally and eccentrically associated with the other of said input shafts, a plate secured to said outputJ shaft, said plate having a plurality of radial slots therein spaced equi-:listantly from each other, means carried by said drive member and being intermittently engageable in said slots upon reciprocation of said drive member to intermittently drive said output shaft, means operatively connected to said input shafts for intermittently locking said output shaft and including a member secured to each input shaft, and said member secured to said output shaft, a portion of the periphery of each of said members secured to said input shafts being an arc of a circle, a portion of the periphery between two successive slots of said plate being an are of a circle, the radii of all of said arcs being substantially the same.

WILLIAM GANZ.

REFERENCES CITED The following references are of record in th le of this patent:

UNITED STATES PATENTS Number Name Date 1,623,978 Rober Apr. 12, 1927 1,660,527 Rober Feb. 28, 1928 FGREIGN PATENTS Number Country Date 338,208 Germany June 13, 1921 

